1 /* GStreamer

     2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

     3  * Copyright (C) <2006> Nokia Corporation, Stefan Kost <stefan.kost@nokia.com>.

     4  *

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Library General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  * Library General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU Library General Public

    16  * License along with this library; if not, write to the

    17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    18  * Boston, MA 02111-1307, USA.

    19  */

    20 

    21 

    22 #ifndef __GST_WAVPARSE_H__

    23 #define __GST_WAVPARSE_H__

    24 

    25 

    26 #include <gst/gst.h>

    27 #include <gst/gst_global.h>

    28 #include <gst/riff/riff-read.h>

    29 #include <gst/riff/riff-ids.h>

    30 #include <gst/riff/riff-media.h>

    31 

    32 #include <gst/base/gstadapter.h>

    33 

    34 G_BEGIN_DECLS

    35 

    36 #define GST_TYPE_WAVPARSE \

    37   (gst_wavparse_get_type())

    38 #define GST_WAVPARSE(obj) \

    39   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WAVPARSE,GstWavParse))

    40 #define GST_WAVPARSE_CLASS(klass) \

    41   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WAVPARSE,GstWavParseClass))

    42 #define GST_IS_WAVPARSE(obj) \

    43   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WAVPARSE))

    44 #define GST_IS_WAVPARSE_CLASS(klass) \

    45   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WAVPARSE))

    46 

    47 typedef enum {

    48   GST_WAVPARSE_START,

    49   GST_WAVPARSE_HEADER,

    50   GST_WAVPARSE_DATA,

    51 } GstWavParseState;

    52 

    53 typedef struct _GstWavParse GstWavParse;

    54 typedef struct _GstWavParseClass GstWavParseClass;

    55 

    56 /**

    57  * GstWavParse:

    58  *

    59  * Opaque data structure.

    60  */

    61 struct _GstWavParse {

    62   GstElement parent;

    63 

    64   /* pads */

    65   GstPad *sinkpad,*srcpad;

    66 

    67   /* for delayed source pad creation for when

    68    * we have the first chunk of data and know

    69    * the format for sure */

    70   GstCaps     *caps;

    71   GstTagList  *tags;

    72   GstEvent    *newsegment;

    73 

    74   /* WAVE decoding state */

    75   GstWavParseState state;

    76 

    77   /* format of audio, see defines below */

    78   gint format;

    79 

    80   /* useful audio data */

    81   guint16 depth;

    82   gint rate;

    83   guint16 channels;

    84   guint16 blockalign;

    85   guint16 width;

    86   guint32 bps;

    87 

    88   guint bytes_per_sample;

    89 

    90   /* position in data part */

    91   guint64	offset;

    92   guint64	end_offset;

    93   guint64 	dataleft;

    94   /* offset/length of data part */

    95   guint64 	datastart;

    96   guint64 	datasize;

    97   

    98   /* pending seek */

    99   GstEvent *seek_event;

   100 

   101   /* For streaming */

   102   GstAdapter *adapter;

   103   gboolean got_fmt;

   104   gboolean streaming;

   105 

   106   /* configured segment, start/stop expressed in time */

   107   GstSegment segment;

   108   gboolean segment_running;

   109   

   110   /* for late pad configuration */

   111   gboolean first;

   112 };

   113 

   114 struct _GstWavParseClass {

   115   GstElementClass parent_class;

   116 };

   117 

   118 GType gst_wavparse_get_type(void);

   119 

   120 G_END_DECLS

   121 

   122 #endif /* __GST_WAVPARSE_H__ */